Hydrodynamical model of QED cascade expansion in an extremely strong laser pulse

The development of a self-sustained quantum electrodynamical (QED) cascade in single strong laser pulse is studied analytically and numerically. A hydrodynamical approach used to construct an analytical model evolution, which includes the key features observed 3D QED particle-in-cell (QED-PIC) simulations, such as magnetic field dominance plasma energy absorption. equations are derived closed form solved Direct comparison between solutions QED-PIC simulations shows that our able describe complex nonlinear process qualitatively well. Various regimes interaction based on intensity revealed both results simulations.